“…This observation suggests that more sulfur amino acids might be required for the maximum increase in serum level of cholesterol and urinary excretion of ascorbic acid than for maximum body weight gain and nitrogen balance. Dietary sulfur amino acids influence the serum level of cholesterol level in many species (7)(8)(9)(10)(11)(12)(13)(14)(15). Recently we demonstrated that serum cholesterol and urinary ascorbic acid levels of rats fed PCB had a significant positive correlation with dietary sulfur amino acids (16).…”